Most teachers who could sell their question banks don't, and the reason is almost never the questions. It is the assumption — usually wrong — that they're not allowed to.
So let's deal with that first, before anything else.
Who Actually Owns Your Questions
Questions you wrote yourself, drawing on your own subject knowledge, in your own time: yours. Your school does not automatically own your intellectual output by virtue of employing you — that is not how UK employment and IP law generally works. What matters is whether you wrote them in school time, on school equipment, as a direct part of your contracted duties. If you did, read your contract — not because the answer is probably no, but because knowing it's yes is worth five minutes before you list anything.
If you are in any doubt: your teaching union almost certainly has a template answer for this. One email, one reply, and you know where you stand permanently rather than assuming.
For most teachers, the five minutes confirms what they already suspected: the questions are theirs.
The Thing Nobody Tells You About Pricing
You are not competing with free resources. You are competing with published revision platforms that charge £10 to £15 a month for access to worse questions written by people who haven't seen the paper applied to real students in years. That is your actual competition, and you are cheaper and more specific than all of it.
Single-topic packs: £3 to £8. A full-specification bank across multiple topics, with mark schemes: £15 to £35. Price the mark scheme, not just the questions — it is harder to write and more valuable to the person buying.
That last point is not obvious until you have tried to buy a question pack where the mark scheme says "accept any reasonable answer." The mark scheme is the product. Questions are how you demonstrate the product exists.
Three Things That Separate a Selling Bank from a Sitting-in-a-Folder Bank
Specification stated twice — once on the listing, once inside the document. AQA or OCR. Year group. Paper. A teacher who downloads the wrong spec wastes an evening and leaves a one-star review. A teacher who knew exactly what they were getting before they bought recommends it to the department.
Mark schemes detailed enough to mark cold. Not "see mark scheme guidance." Not "award one mark for identifying the cause." The actual answer, the actual credit points, the actual common misconceptions that don't get credit. If a cover teacher who has never taught the topic can mark it reliably from your mark scheme, it is ready to sell. If they can't, it isn't.
Questions organised so someone can pull exactly what they need in two minutes. By topic, by difficulty, by question type — any system, as long as it is explicit and consistent. A document that requires reading every question to find the right one will get used once and then abandoned.
TES vs. Doing It Yourself
TES puts you beside sellers with thousands of reviews in a category where buyers filter by rating first. That is hard to overcome as a new listing, regardless of how good the questions are.
A page you control — a blog post stating the specification, the level, what is included and what the mark scheme covers — costs nothing and keeps the whole margin. A teacher finding you through a search for a specific specification is already exactly the buyer you want. They are not browsing: they are looking for what you made.
The question is whether you want to build something on a platform that takes a cut and controls your visibility, or start with a checkout link that works on day one and scales without permission.
If you want that part laid out in order — how to set up the page, the checkout, and the first pins — that is what my guide covers.